|
|
Universal precision rectifiers with current active elements
Ryšavý, Lukáš ; Jeřábek, Jan (referee) ; Langhammer, Lukáš (advisor)
In this thesis new circuit solutions of universal precision rectifiers with current active elements are proposed. Based on the knowledge of current active elements, universal precision rectifiers and adverse impacts on these circuits new circuit solutions are proposed. These circuits are then simulated and compared with the known circuits of precision rectifiers. In concusion two original circuits and two proposed circuit solutions based on original ones are implemented, their properties are experimentally measured and their function are verified. The main active element in the original circuit are the OPA or THS, the proposed circuits are used the OPA and THS and the universal current conveyor, which offers a wide range of application use and realization of different variations of active current elements.
|
|
|
Simulation scenarios in IT Guru environment for Communication technology course
Rybka, Štěpán ; Hasmanda, Martin (referee) ; Jeřábek, Jan (advisor)
This thesis called Simulation scenarios in an IT Guru enviroment for Communication Technologies deals with the design of laboratory experiments for the above-mentioned subject. The first part is a theoretical introduction to the protocols. The practical part contains the tasks itself. The work includes four laboratory tasks with a detailed description of the work and an illustrative pictures. The first two tasks are focused on the application protocols, with which the user comes into contact with every day. The other two are focused on routing protocols, precisely the internal routing protocol IS-IS and BGP external routing protocol. A free version of simulation software OPNET Modeler and IT Guru enviroment version 9.1.A were used to create the work.
|
|
|
Modelling of differential current amplifier
Polák, Josef ; Šotner, Roman (referee) ; Jeřábek, Jan (advisor)
The aim of my diploma thesis was programming of systems for measuring AC, DC and impedance measurements. Each measuring system measures selected characteristics of current amplifier with controllable amplification DACA_N. Control programs I have created in Agilent VEE Pro 9.2. The measured data are stored to executable files in MS Excel for further processing. With created measurement programs I made measurements of eight current amplifiers. The results of individual measurements I compiled into graphs and compared with each other circuit characteristics of amplifiers. Then there is described controlling and connection of current amplifier and its construction. At the end the diploma thesis describes amplifiers with the worst and the best measured circuit characteristics. The measured values show that the amplifier DACA_N with slight differences works by theoretical assumptions and measurement systems suggested by me work with no problem.
|
|
|
Oscillators and function generators using current and voltage conveyors
Šťastný, Lukáš ; Jeřábek, Jan (referee) ; Koton, Jaroslav (advisor)
Conveyors are an integral part of modern devices. In this thesis, a slew of areas oscillators and function generators with current and voltage conveyors. Individual applications are categorized according involvement with conveyors and other elements. The functionality of the need for involvement in the program PSpice simulation. As a current conveyor is used OPA861, EL2082, further use of RC circuits and opto-CNY 17.
|
|
|
Multifunction frequency filters using GCMI
Voráč, Ladislav ; Minarčík, Martin (referee) ; Jeřábek, Jan (advisor)
At the beginning of my work are the frequency filter possibilities and their use discussed. I continue with the basic theoretical filter characters, their description through the use of the transfer functions, the transfer filter function of the second rank and further possible filter diversification on active and pasive ones. In the next chapter, there is a current mode introduced with its use and reasons why to pick it up. As next are several active current items descriped, that will be used for construction of the frequency filter of the second rank. The most used item for the application in the pure current mode is GMCI, which easily means Generalized Current Mirrors and Inventors. It is obvious already from its name what does it do, mirror reflecting and inverting. The next chapter talks about the concept method of the autonomous circuit, where in several blocks is the process of the frequency filter concept to be found. Last four chapters are focused on the detailed frequency filters concept, with all its active elements and their simulations. One of the circuit was choosen for the practical realization and at the conclusion it shows the comparison of the measured and simulated transfer parameters.
|
|
|
Laboratory task of the surveillance camera system
Špondr, Marek ; Jeřábek, Jan (referee) ; Burda, Karel (advisor)
The goal of this thesis is to describe principles, technical solutions and basic components of the surveillance camera system. The second part of this thesis describes how to connect and control specific surveillance camera system. For this specific surveillance camera system is designed laboratory task for 90 minutes.
|
|
|
Simulation of finding a computer position in Internet
Vrzal, Tomáš ; Jeřábek, Jan (referee) ; Komosný, Dan (advisor)
This bachelor’s thesis puts mind to problematic transmission multimedia data via RTP/RTCP protocol with hierarchical aggregation. In next parts of thesis are explaining design principle and use this transmission via tree structure. In last part is description application in which the simulation ambient uses tree structure. For best results of simulation is use algorithm called “binning”. Application has graphic interface, so that easy manipulation with it. In insertion are pictures and application code.
|
|
| |
|
|
Laboratory exercises in OPNET environmentfor Communication technolgies course
Kasper, Robin ; Hošek, Jiří (referee) ; Jeřábek, Jan (advisor)
This master’s thesis deals with the design of laboratory exercises for the Communication Technologies course that is included in the second year of bachelor’s degree in Teleinformatics. This course represents first introduction of students with network protocols and technologies, therefore, the thesis deals with just the basic physical technologies, routing protocols and transport layer protocols. The introductory part of the thesis is devoted to theoretical knowledge to particular tasks. For the design of laboratory exercises is used OPNET environment, concretely its unpaid version IT Guru Academic Edition 9.1. The first task is focused on the differences in two basic transport protocols Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). The second task is orientated on the differences in the transmission network parameters using wireless networks and Ethernet technologies. In the third task the routing protocols Routing Information Protocol (RIP) a Open Shortest Path First (OSPF) are compared. These are protocols of a group Interior Gateway Protocol (IGP) that are characterized by the usage within a single autonomous system. The last exercise is aimed at Asynchronous Transfer Mode (ATM) and Frame Relay technologies, which are technologies used mainly in networks Wide Area Network (WAN). All devised exercises are accompanied by detailed instructions for students including supplementary questions and tasks leading to individual work and reflection. The thesis includes model solutions to these four exercises and CD where are inserted all programs source codes.
|
|
| |
guest ::
RSS feed.